I think the point the poster is making is the specific type of disposable address they've used. Addresses on mailinator.com can be read by anyone without a password (go see for yourself). Presumably anyone could just do a password reset and take over the account.

However, just because they used a disposable contact email in the whois record, it's not necessarily the case that they used the same for the registrar account or anything else (so taking over the domain isn't as easy as implied).

In any case, I don't see any issues with "disposable" email addresses such as a random alias on a private domain with a catch-all.

"Why you shouldn't use disposable email addresses to register domains"

Err... was there an extra negative in there? I'm failing to see why this is evidence that you shouldn't use a disposable email address.

yeah right, so my official emails will get spammed to death forever by the newbiest kid who can grep the whois database.

Of course you need to use a disposable email for pretty much /everything/ these days.

Oh wow: "there are 65,117 domains that matched this search query." (for domains@microsoft.com)